Sister Sister: Tia and Tamera Mowry play twins who were separated at birth and by chance meet each other in a shopping mall. Ray Campbell, Tameras adopted father, is very different from Tias adopted mother, Lisa Landry, but the twins dont want to be separated so Ray and Lisa end up living together. The series often focuses on the trouble the twins get into due to their identical appearance and the love-hate relationship between Lisa and Ray.